WEll wont both amps cut the power in half on two subs. I would run the subs in parallel in 4 ohms each to the mono since it runs 1000 watts at 2 ohms. The 2 channel on the other hand has 1200 watts at 4 ohms, so wouldn't that be 600 watts a sub, instead of 500 watts a sub from the mono at a lower resistance?